External risk intelligence

Dell PowerProtect Data Domain Stack-based Buffer Overflow Leading to Command Execution.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-103780

The affected product, Dell PowerProtect Data Domain, is an enterprise-grade storage and data protection system typically deployed within internal data center networks or private environments. While it is network-accessible, it is not designed to be a public-facing internet edge service. Therefore, while remote access is possible, common deployment patterns generally do not involve exposing these systems directly to the public internet.

Buffer Overflow

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

Dell PowerProtect Data Domain systems have a critical vulnerability that could allow an attacker to execute commands remotely. This issue affects data protection capabilities, which are essential for business continuity and recovery. The main concern is to confirm if our specific systems are exposed and to what extent.

  • Command execution risk in data protection systems.
  • Potential for significant disruption to business operations.
  • Assess relevance and confirm exposure to this threat.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can leverage network access to target Dell PowerProtect Data Domain systems. By sending specially crafted data to a vulnerable component, the attacker can trigger a buffer overflow, potentially leading to the execution of arbitrary commands.

  • Remote network access required.
  • Specially crafted data triggers overflow.
  • Command execution risk.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker with remote access to execute commands on the system. This means an attacker could potentially take control of the affected system and its functions.

  • System data and service behavior at risk.
  • Remote, unauthenticated command execution.
  • Potential system compromise and data access.

Operational Fix

Recommended remediation, mitigation, and detection steps

In most environments, Dell PowerProtect Data Domain systems are managed by infrastructure or platform teams responsible for data protection services, with oversight from security and potentially vendor management teams. The immediate priority is to identify all deployed instances, determine their business criticality and network exposure, and then assign ownership for remediation planning.

  • Infrastructure/platform teams own the issue.
  • Verify affected systems and network exposure.
  • Plan risk-based remediation with vendor coordination.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is Dell PowerProtect Data Domain?

Dell PowerProtect Data Domain is an enterprise-grade storage and data protection platform. Organizations use it to back up, archive, and recover critical business data, serving as a foundational component for ensuring data integrity and business continuity.

What does this CVE-2026-103780 stack-based buffer overflow mean?

This vulnerability, classified as CWE-121, occurs when a program writes more data to a memory buffer than it can hold. In this case, an attacker sends specially crafted data that overflows the buffer, potentially allowing them to run unauthorized commands on the system.

How can an attacker trigger this vulnerability?

An unauthenticated attacker with remote network access to the system can trigger the overflow by sending malicious data to the vulnerable component. Simply interacting with standard, non-malicious system functions or valid administrative tasks will not trigger this error.

Do I need to worry if my system is internal?

According to Halo Surface Signal, this software is typically deployed within internal data centers and is not meant to be internet-facing. While remote access is technically possible, systems isolated from the public internet have a reduced risk profile compared to those directly exposed to the web.

How should I start responding to this issue?

First, identify all instances of Dell PowerProtect Data Domain within your environment. Determine which systems are running the affected versions and evaluate their network placement. Once mapped, coordinate with your infrastructure teams to plan the necessary security updates.

References